Shoe last



F925; 19, 1924. 11,4841,fi9

J. F. JONAS SHOE LAST Filed April 23. 1921 2 Sheets-Sheet 1 Patented is, rare. h fi i JACOB F. JONAS, 05 BELLEVUE, KEHTUCKY, ASSIGNOR TO THE KBIPPENDOBFDITT- MANN GGMPANY, 0F CINCINNATI, 01 1118, A CORPORATION OF OHIO.

SHGZE LAST.

Application filed April 23, 1921.

To aZZ whom it may concern:

Be it known that 1, Moon is. JoNAs, a citizen of the United States, and residing at Bellevue, in the county of Campbell and State of Kentucky, have invented a new and useful improvement in Shoe Lasts, of which the following specification is a full disclosure.

This invention relates to an improvement in shoe lasts and particularly to the contour construction of the last at the instep and shank p rtions thereof, so as to correspond approximately to the anatomical structure of the human foot when sustaining weight.

fin object of the present invention is to provide a last of such construction as to enable the formation thereon of an improved shoe as shown in a copending application, berial No. 162,132, filed April 18, 1921.

Another object of the invention is to construct the bottom shank portion of the last of the contour of the metatarsal portion of the foot when depressed under the weight of the person to provide a surface arch longitudinally from the heel portion to the fore part of the last, substantially fiat or in a horizontal plane transversely with the trans verse elements thereof, parallel to each other and approximately to the horizontal transverse of the last fore part. The outline at the inner side describes a pronounced irregular curved linemeeting with the lower in step surface, which instep surface is arched longitudinal and transverse of the anatomical contour of the foot. 1

Another object of the invention is to provide the base surface of the last with a central depression at approximately the junction of the fore and shank parts for the provision of a raised or boss elevation in the formation of the shoe sole.

Qther objects and features of advantages will be more fully set forth in the description of the accompanying drawings, forming a part of the specification, and in the drawings like characters of reference denote corresponding parts throughout the several views, of which:

Fig. 1 is a top plan view of the last illustrating the outline of the bottom surface in dotted lines.

Fig. 2 is a side elevation thereof.

Fig. 3 is a plan view of the bottom of the last.

Serial No. 463,863.

. e is a section on line 4:, 4,, Figs. 1, 2

lm ,l. a. wo oo 5 is a section on line 5, 5, Figs. 1, 2

6 is a section on line 6, 6, Figs. 1, 2

ihis improved last is of a construction for obtaining the formation of a shoe adapted to cooperate with and correspond to the general anatomical structure of the human foot, particularly at the arch or shank portion of the foot when sustaining weight, as during standing or walking postures of the person, the shoe being designed to provide a sus taining surface for the foot corresponding in diagram to the treading portions of the foot and comfortably embrace and sustain the nontreading portions.

Avoiding herein any anatomical treatise of the foot or characterize the contour of the foot when at rest or when pressed or bearing upon a flat surface, except to note that for a normal foot, when pressed upon a ll 1 surface, it would be susceptible of making .131 impression at the shank or instep portion, c rresponding in outline approximately as shown and as represented by the bottom f the last Fin. 3. Thi' oresents a sol race 0 o s 1 sharply grooved line at the inner side of the foot as indicated at a in said figure. From such inner foot line, which treads the surface, the inner shank portion of the foot curves upwardly in longitudinal and transverse directions, which may be referred to, for the sake of illustration, as the instep portion of the foot.

It is therefore important that the last be of a contour to permit of the proper shaping of the shoe over the last and enabling the shoe to be formed to provide a proper tread surface for the foot and support for the non-tread portions in conformity to the anatomical structure of the foot when bearing the weight of the person and thus prcvent the foot rubbing against the shoe surfaces, rcsulting in injury to the foot.

The last illustrated is of the two-part type, although it is obvious that it may rep resent any of the general types. The heel portion 1 has secured thereto the usual heel seat plate 2. The shank and instep portion, as an intermediate part 3 of the last, is of a contour corresponding to the anatomical contour of a normal foot when depressed.

' The numeral indicates the base surface of the fore part, substantially of a fiat or 1 horizontal plane transversely, as shown in Fig. 6. An approximately concave recess 6 is formed in the base surface of the last at approximately the junction of the shank portion and fore part. The shank surface 7 is arcuate longitudinally and in a smooth curved surface merges with the sole surface of the fore part of the last. The

V shank base surface 7 transversely is substantially flat, and of such formation that its transverse elements are all, in this preferred embodiment, substantially parallel to each other and also to the transverse elements of the fiat tread portion 5 of the fore part. The shank base surface 7 has an inner outline a of irregular formation, being of ogee configuration from a point approximately at the medial part of the shank portion forwardly to the fore part and from such medial part rearward to the heel in approximately a parabolic curve. This inner edge or marginal shank line representing the inner outline of the surface engaging portion of the foot when depressed by the weight of a person when standing or walk ing. The base surface from this curved V inner edge line to the outer edge line transployed in the shoe is of greater width than the shank surface 7, so as to extend beyond the curved edge a along which the extended portion of the insole is bent upwardly and molded to the configuration of the instep surface 9. The curved edge allows the insole to be bent without buckling its shank surface.

The ogee curved edge widens the base broad fore part width, to provide ample width for the fore part of the foot, although vision-ally presents a reduced or narrow effect adding materially to the attractiveness of the shoe. The base surface of the last allows ample widths for the foot'at all points transversely which tread the surface and permits the shoe insole to be bent upwardly for supporting and engaging such inner surface of the foot which is elevated above the tread surface.

A shoe finished. over this viewed from the sole or bottom, presents two sole surfaces at the shank, an outer approximately fiat surface and an inner surface curved at an angle to the outer surface. The outer sole surface at the inner instep side is thus visible from a side view of the shoe, all lending to produce a comfortable and attractive shoe.

Having described my invention, I claim;

- A shoe last having a shank with a base surface substantially plane horizontally and arcuate longitudinally merging in a curved smooth surface with the base surface of the fore part of the last, said shank base surface having an inner side outline of an irregular curved outline corresponding to the outline of the treading surface of the foot when depressed, and an instep part arcuate inwardly in longitudinal and arcuate outwardly in transverse directions and terminating with the irregular inner side. outline of said shank surface in a sharp line.

In witness whereof, I hereunto subscribe my name, as attested by the two subscribing witnesses. V

JACOB F. JONAS.

Witnesses:

L. A. BECK, J. G. Juniors. 1

last, i when surface from a narrow shank width to a V 

